EP3170684B1 - Ventilschaftbasierter, luftaufrechterhaltender reifen und verfahren - Google Patents

Ventilschaftbasierter, luftaufrechterhaltender reifen und verfahren Download PDF

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Publication number
EP3170684B1
EP3170684B1 EP16199096.5A EP16199096A EP3170684B1 EP 3170684 B1 EP3170684 B1 EP 3170684B1 EP 16199096 A EP16199096 A EP 16199096A EP 3170684 B1 EP3170684 B1 EP 3170684B1
Authority
EP
European Patent Office
Prior art keywords
tire
air
valve
valve housing
valve stem
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP16199096.5A
Other languages
English (en)
French (fr)
Other versions
EP3170684A1 (de
Inventor
Robin Lamgaday
Cheng-Hsiung Lin
Arun Kumar Byatarayanapura Gopala
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US14/946,005 external-priority patent/US9796224B2/en
Priority claimed from US14/945,995 external-priority patent/US9796223B2/en
Application filed by Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of EP3170684A1 publication Critical patent/EP3170684A1/de
Application granted granted Critical
Publication of EP3170684B1 publication Critical patent/EP3170684B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/10—Arrangement of tyre-inflating pumps mounted on vehicles
    • B60C23/12—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel
    • B60C23/121—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel the pumps being mounted on the tyres
    • B60C23/123—Elongate peristaltic pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/10—Arrangement of tyre-inflating pumps mounted on vehicles
    • B60C23/12—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel
    • B60C23/135—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel activated due to tyre deformation

Definitions

  • the present invention relates generally to air maintenance tires and, more specifically, to a valve stem-based air maintenance tire for maintaining tire air pressure.
  • Tire Pressure Monitoring Systems have been proposed to warn drivers when tire pressure is significantly low. Such systems, however, remain dependent upon the driver taking remedial action when warned to re-inflate a tire to recommended pressure. It is a desirable, therefore, to incorporate an air maintenance feature within a tire that will self-maintain the tire air pressure in order to compensate for any reduction in tire pressure over time without a need for driver intervention.
  • EP-A-3 130 487 which has been published only after the priority date of this application, describes a self-inflating tire having a groove in the tire sidewall deforming segment by segment when the tire rolls under load.
  • the tire comprises an air pumping means and a valve housing disposed adjacent an outward end of a valve stem.
  • the valve housing is operative to selectively open and close to enable a pressurized air flow from a valve stem internal passageway into the tire cavity.
  • the invention relates to a tire in accordance with claim 1.
  • An air maintenance tire assembly in accordance with a preferred aspect of the present invention includes a tire having a tire cavity bounded by first and second sidewalls extending to a tire tread region, air pumping means for generating pressurized air for maintaining air pressure within the tire cavity at a preset pressure level, and a valve housing, preferably a facted valve housing or a cylindrical valve housing, disposed adjacent an outward end of the valve stem and operative to selectively open and close pressurized air flow from the valve stem internal passageway into the tire cavity.
  • the first sidewall has at least one bending region operatively bending within a rolling tire footprint and a sidewall groove defined by groove sidewalls positioned within the bending region of the first tire sidewall. The groove deforms segment by segment between a non-deformed state and a deformed, constricted state in response to the bending of the first sidewall bending region within the rolling tire footprint.
  • the valve housing includes a check valve for maintaining air pressure in the tire cavity at the preset pressure level.
  • the valve housing is a faceted valve housing. According to another preferred aspect of the invention, the valve housing is a cylindrical valve housing.
  • the assembly, the valve housing is constructed of a polymer.
  • the valve housing further includes a relief valve that opens and closes to place the air pumping means in "open” and "closed” conditions.
  • the air pumping means has a tube within the first tire sidewall.
  • the tube is incrementally flattened by rotation of the tire under load.
  • the valve housing further includes a manual fill assembly disposed at an outer end of the valve housing.
  • a manual fill assembly of the valve housing includes a check valve such that the tire cavity may be manually pressurized identically to manual pressurization directly through the valve stem.
  • a part of a tube of the air pumping means is sequentially squeezed when the part is adjacent a tire footprint.
  • sequential flattening of part of the air pumping means, segment by segment directs air to the valve housing and the tire cavity.
  • a method maintains a predetermined air pressure within a tire.
  • the method preferably includes the steps of: positioning an elongate valve stem to project outward from a tire cavity of the tire, the valve stem having an elongate internal air passageway for delivering pressurized air into the tire cavity; positioning a valve housing, preferably a facted valve housing or a cylindrical valve housing, onto the valve stem; selectively opening and closing the valve stem internal air passageway to control pressurized air flow from the valve stem internal passageway into the tire cavity; and coupling an air pumping means to the valve housing such that pressurized air is directed through an outward end of the valve stem internal passageway and into the tire cavity.
  • the air pumping means includes a first sidewall of the tire with at least one bending region operatively bending when adjacent a tire footprint and a sidewall groove defined by groove sidewalls positioned within the bending region of the first tire sidewall, the groove deforming segment by segment between a non-deformed state and a deformed, constricted state in response to the bending of the first sidewall bending region within the tire footprint.
  • the method further steps include supporting the tire on a rim, extending the valve stem from the tire through an aperture in the rim, and positioning the valve housing external to the tire cavity.
  • the method comprises providing a check valve in the valve stem that selectively opens and closes an air passage from the valve stem passageway into the tire cavity.
  • the method comprises a further step of including a relief valve within the valve housing.
  • further steps include coupling an internal chamber of the valve housing to receive pressurized air the air pumping means and selectively opening and closing a check valve of the valve stem responsive to a presence and absence of pressurized air within the internal chamber.
  • further steps include extending the valve stem from the tire through an aperture extending through a rim supporting the tire and mounting the valve housing to the valve stem.
  • further steps include positioning an air passageway within a first tire sidewall operatively located to compress, segment by segment, from an expanded diameter to a substantially reduced diameter responsive to a bending strain introduced into the first sidewall from the rotating tire under load thereby forcing air, segment by segment, along the sidewall air passageway and connecting the air passageway to a radially outward end of the valve stem thereby directing pressurized air to the tire cavity.
  • Axial and “axially” means lines or directions that are parallel to the axis of rotation of the tire.
  • “Circumferential” means lines or directions extending along the perimeter of the surface of the annular tread perpendicular to the axial direction.
  • “Footprint” means the contact patch or area of contact of the tire tread with a flat surface at zero speed and under normal load and pressure.
  • “Lateral” means an axial direction.
  • Periodaltic means operating by means of wave-like contractions that propel contained matter, such as air, along tubular pathways.
  • Ring and radially means directions radially toward or away from the axis of rotation of the tire.
  • a tire assembly 10 in accordance with a first embodiment of the present invention is disclosed. It shows a tire 12, a peristaltic pump assembly 14, and a tire rim 16.
  • the tire 12 preferably mounts in conventional fashion to the rim 16.
  • the tire 12 may be of conventional construction, having a pair of sidewalls (only sidewall 18 being shown) extending from opposite bead areas (only bead area 22 being shown) to a crown or tire tread region 26.
  • the tire 12 and rim 16 together enclose a tire cavity 28.
  • the peristaltic pump assembly 14 preferably includes an annular air tube 30 that encloses an annular groove, or passageway or channel.
  • the tube 30 is preferably be formed of a resilient, flexible material, such as plastic or rubber compounds, that is capable of withstanding repeated deformation cycles. So constructed, the tube 30 may deform within a tire 12 into a flattened condition subject to external force and, upon removal of such force, return to an initial condition.
  • the cross-section of the tube 30 in an unstressed state may be generally circular, but alternative cross-section geometries may also be used.
  • the tube 30 is of a diameter sufficient to operatively transfer a requisite volume of air for the purpose of pumping air into the tire cavity 28 to maintain the tire 12 at a preferred inflation pressure.
  • the tube 30 preferably mount closely within the groove in the tire 12 and sequentially flatten as the tire rotates under load.
  • the segment by segment flattening of the tube 30 as the tire 12 pumps air along the air passageway/groove and into the tire cavity 28 to maintain air pressure.
  • a peristaltic pumping system 14 employing the tube 30 within a sidewall groove is shown in US-B-8,042,586 .
  • the pump tube 30 is preferably generally annular and preferably circumscribes a lower tire sidewall region proximate to the bead region 22. However, other configurations for the tube 30 may be derived without departing from the present invention.
  • Opposite ends 34, 36 of the tube 30 connect to a pumping assembly 100.
  • the pumping assembly 100 preferably includes two pump tubes 101, 102 for connecting the ends of the tube 30 to the pumping assembly.
  • the pump tubes 101, 102 attach to a faceted housing 110 of the pumping assembly 14, which is preferably threadedly attached to a valve stem 80 of the tire/rim assembly 12, 16. The faceting of the valve housing allows it to reduce weight of the housing.
  • a one-way check valve 76 Seated within the valve stem 80 is a one-way check valve 76 that opens and closes to admit air from the tube 30 into the tire cavity 28 during a manual filling of the tire cavity.
  • the valve housing 110 may further have a relief valve 105 that opens and closes to place the pumping assembly 14 in "open” and “closed” states. Air may be admitted into the valve housing 110 and may be directed from the tube 30 to the tire cavity 28.
  • the tube 30 may be incorporated into a groove within a tire sidewall and may be incrementally flattened by rotation of the tire 12 under load.
  • a manual fill assembly 200 may be located at the upper end, or outer end, of the valve housing 101.
  • the manual fill assembly 200 may include a check valve 202 such that the tire cavity 28 may be pressurized manually identically to manual pressurization directly through the valve stem 80.
  • FIGS. 5 and 6 respectively, show schematic diagram of the AMT assembly 10 for a counterclockwise rotation of the tire 12 ( FIG. 5 ) and a clockwise rotation of the tire 12 ( FIG. 6 ).
  • the tube 30 may be sequentially flattened, or squeezed, when adjacent the tire footprint.
  • the sequential flattening of the tube passageway, segment by segment, may direct evacuated air from the flattened segments to be pumped in the directions shown in FIGS. 5 and 6 to the housing 110.
  • the check valve 76 of the valve stem 80 and the check valve 202 of the manual fill assembly 200 may include a conventional valve stem core used for conventional inflation of tires and a valve core.
  • the valve core may be a "Schrader Valve Core" and include an elongate housing through which a valve shaft extends.
  • a valve seal component may seat within the elongate housing and be coupled to the valve shaft.
  • a biasing spring may encircle the valve shaft and bias the sealing component within the elongate housing in an "up", or “closed” position against the valve seal component.
  • An air passageway through the valve core may be biased in the "closed” state until the valve shaft moves and the valve sealing component is moved thereby to a “down", or “open” position thereby allowing atmospheric air to enter the air passageway and be directed toward the tire cavity 28.
  • a tire assembly 10 in accordance with a second embodiment of the present invention is disclosed.
  • the first and the second embodiment are the same with respect to design and operation except that the facted housing 110 of the first embodiment is a cylindrical housing 110' in the second embodiment.
  • the cylindrical housing 110' has a smooth surface and is compact, robust and resistant against damages or impact from the outside.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Check Valves (AREA)

Claims (15)

  1. Reifen mit Luftdruckwartung, umfassend einen Reifenhohlraum (28), der von einer ersten und einer zweiten Seitenwand (18), die sich zu einem Reifenlaufflächenbereich (26) erstrecken, begrenzt wird, Luftpumpmittel (14) zur Erzeugung von Druckluft zur Aufrechterhaltung des Luftdrucks in dem Reifenhohlraum (28) auf einem voreingestellten Druckniveau, und ein Ventilgehäuse (110), das auf einem auswärts befindlichen Ende eines Ventilschafts (80) angeordnet ist, wobei das Ventilgehäuse (110) wirksam ist, um Druckluftstrom von einem auswärts befindlichen Ende eines inneren Durchgangs des Ventilschafts in den Reifenhohlraum (28) selektiv zu öffnen und abzuschließen, wobei die erste Seitenwand (18) mindestens einen Biegebereich, der sich wirksam in einer rollenden Reifenaufstandsfläche verbiegt, und eine durch jeweilige Wände definierte Seitenwandnut oder -kanal, die bzw. der in dem Biegebereich der ersten Seitenwand (18) angeordnet ist, aufweist, wobei die Nut oder der Kanal, in Reaktion auf das Verbiegen des Biegebereichs der ersten Seitenwand (18) in der rollenden Reifenaufstandsfläche, sich Segment für Segment zwischen einem nicht verformten Zustand und einem verformten, verengten Zustand verformt, und wobei das Luftpumpmittel (14) einen ringförmigen Luftschlauch (30) und zwei Pumpschläuche (101, 102) zum Verbinden der Enden des Schlauchs (30) mit dem Gehäuse (110) beinhaltet.
  2. Reifen mit Luftdruckwartung nach Anspruch 1, wobei das Ventilgehäuse (110) ein Rückschlagventil (76) zur Aufrechterhaltung des Luftdrucks in dem Reifenhohlraum (28) auf dem voreingestellten Druckniveau beinhaltet.
  3. Reifen mit Luftdruckwartung nach Anspruch 1 oder 2, wobei das Ventilgehäuse (110) aus einem Polymer ausgeführt ist.
  4. Reifen mit Luftdruckwartung nach mindestens einem der vorhergehenden Ansprüche, wobei das Ventilgehäuse (110) ein facettiertes Ventilgehäuse oder ein zylindrisches Ventilgehäuse ist.
  5. Reifen mit Luftdruckwartung nach mindestens einem der vorhergehenden Ansprüche, wobei das Ventilgehäuse (110) weiter ein Überdruckventil (105) beinhaltet, das sich öffnen und schließen kann, um das Luftpumpmittel (14) in einen "offenen" und einen "geschlossenen" Zustand zu versetzen.
  6. Reifen mit Luftdruckwartung nach mindestens einem der vorhergehenden Ansprüche, wobei das Ventilgehäuse (110) weiter eine manuelle Füllanordnung (200) beinhaltet, die an einem äußeren Ende des Ventilgehäuses (110) angeordnet ist.
  7. Reifen mit Luftdruckwartung nach mindestens einem der vorhergehenden Ansprüche, wobei eine manuelle Füllanordnung (200) des Ventilgehäuses (110) ein Rückschlagventil (202) beinhaltet, sodass der Reifenhohlraum (28) manuell unter Druck gesetzt werden kann, identisch zu manueller Druckbeaufschlagung direkt durch den Ventilschaft (80).
  8. Reifen mit Luftdruckwartung nach mindestens einem der vorhergehenden Ansprüche, wobei das Ventilgehäuse (110), bevorzugt das facettierte Ventilgehäuse oder das zylindrische Ventilgehäuse, auf dem Ventilschaft (80) angeordnet ist.
  9. Verfahren zur Aufrechterhaltung eines vorgegebenen Luftdrucks in einem Reifen (12), wobei das Verfahren folgende Schritte umfasst:
    Anordnen eines länglichen Ventilschafts (80), sodass er von einem Reifenhohlraum (28) des Reifens (12) nach außen ragt, wobei der Ventilschaft (80) einen länglichen inneren Luftdurchgang zur Zufuhr von Druckluft in den Reifenhohlraum (28) aufweist;
    Anordnen eines Ventilgehäuses (110), bevorzugt eines facettierten Ventilgehäuses oder eines zylindrischen Ventilgehäuses, auf dem Ventilschaft (80);
    selektiv Öffnen und Schließen des inneren Luftdurchgangs des Ventilschafts, um den Druckluftstrom von dem inneren Durchgang des Ventilschafts in den Reifenhohlraum (28) zu steuern; und
    Koppeln eines Luftpumpmittels (14) an das Ventilgehäuse (110), sodass Druckluft durch ein auswärtiges Ende des inneren Durchgangs des Ventilschafts und in den Reifenhohlraum (28) geleitet wird, wobei das Luftpumpmittel (14) einen ringförmigen Luftschlauch (30) und zwei Pumpschläuche (101, 102) zum Verbinden der Enden des Schlauchs (30) mit dem Gehäuse (110) beinhaltet.
  10. Verfahren nach Anspruch 9, wobei das Luftpumpmittel (14) eine erste Seitenwand (18) des Reifens (12) mit mindestens einem ersten Biegebereich, der sich wirksam verbiegt, wenn er zu einer Reifenaufstandsfläche benachbart ist, und eine Seitenwandnut oder -kanal, die bzw. der durch in dem Biegebereich der ersten Seitenwand (18) angeordnete Seitenwände definiert ist, beinhaltet, wobei die Nut oder der Kanal, in Reaktion auf das Verbiegen des ersten Seitenwand-Biegebereichs in der Reifenaufstandsfläche, sich Segment für Segment zwischen einem nicht-verformten Zustand und einem verformten, verengten Zustand verformt.
  11. Verfahren nach Anspruch 9 oder 10, weiter folgende Schritte umfassend:
    Aufbringen des Reifens (12) auf eine Felge;
    Erstrecken des Ventilschafts (80) von dem Reifen (12) durch eine Öffnung in der Felge; und
    Anordnen des Ventilgehäuses (110) außerhalb des Reifenhohlraums (28).
  12. Verfahren nach Anspruch 9, 10 oder 11, weiter ein Rückschlagventil (76) in dem Ventilschaft (80) zum selektiven Öffnen und Schließen eines Luftdurchgangs von dem Ventilschaft-Luftdurchgang in den Reifenhohlraum (28) umfassend.
  13. Verfahren nach mindestens einem der vorhergehenden Ansprüche 9 bis 12, weiter den Schritt des Integrierens eines Überdruckventils (105) in das Ventilgehäuse (110) umfassend.
  14. Verfahren nach mindestens einem der vorhergehenden Ansprüche 9 bis 13, weiter folgende Schritte umfassend:
    Koppeln einer inneren Kammer des Ventilgehäuses zur Aufnahme von Druckluft von dem Luftpumpmittel (14); und
    selektiv Öffnen und Schließen eines Rückschlagventils (76) des Ventilschafts (80) in Reaktion auf ein Vorhandensein und Nichtvorhandensein von Druckluft in der inneren Kammer.
  15. Verfahren nach mindestens einem der vorhergehenden Ansprüche 9 bis 14, weiter folgende Schritte umfassend:
    Anordnen eines Luftdurchgangs in einer ersten Seitenwand (18), der wirksam angeordnet ist, um sich, in Reaktion auf eine von dem rotierenden Reifen (12) unter Last in die erste Seitenwand (18) eingebrachte Biegebeanspruchung, Segment für Segment von einem expandierten Durchmesser auf einen im Wesentlichen reduzierten Durchmesser zu komprimieren, wodurch Luft, Segment für Segment, durch den Seitenwand-Luftdurchgang hindurch gedrückt wird; und
    Verbinden des Luftdurchgangs mit einem radial auswärts befindlichen Ende des Ventilschafts (80), wodurch Druckluft zu dem Reifenhohlraum (28) geleitet wird.
EP16199096.5A 2015-11-19 2016-11-16 Ventilschaftbasierter, luftaufrechterhaltender reifen und verfahren Not-in-force EP3170684B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/946,005 US9796224B2 (en) 2015-11-19 2015-11-19 Valve stem-based air maintenance tire and method
US14/945,995 US9796223B2 (en) 2015-11-19 2015-11-19 Valve stem-based air maintenance tire and method

Publications (2)

Publication Number Publication Date
EP3170684A1 EP3170684A1 (de) 2017-05-24
EP3170684B1 true EP3170684B1 (de) 2018-08-22

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EP16199096.5A Not-in-force EP3170684B1 (de) 2015-11-19 2016-11-16 Ventilschaftbasierter, luftaufrechterhaltender reifen und verfahren

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11285764B2 (en) * 2016-12-22 2022-03-29 The Goodyear Tire & Rubber Company Control valve for an air maintenance tire
US10807422B2 (en) * 2016-12-22 2020-10-20 The Goodyear Tire & Rubber Company Inlet control valve for an air maintenance tire

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8113254B2 (en) 2009-12-21 2012-02-14 The Goodyear Tire & Rubber Company Self-inflating tire
US8042586B2 (en) 2009-12-21 2011-10-25 The Goodyear Tire & Rubber Company Self-inflating tire assembly
US9415640B2 (en) * 2014-08-12 2016-08-16 The Goodyear Tire & Rubber Company Valve stem located control regulator for an air maintenance tire
US9533534B2 (en) * 2014-10-22 2017-01-03 The Goodyear Tire & Rubber Company Air maintenance tire and valve assembly and method
US9796222B2 (en) * 2015-08-11 2017-10-24 The Goodyear Tire & Rubber Company Valve stem-based air maintenance tire and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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